Marc Anthony and Jennifer Lopez
02/01/2010 at 03:00 PM EST
and Marc Anthony
held court with a who's who of stars – everyone from Rihanna
to six-time Grammy winner Beyoncé
– at music mogul L.A. Reid's post-Grammy Awards
dinner party at Cecconi's in West Hollywood. Lopez had some girl talk with Nicole Richie
, before settling down to the table, while Anthony and Joel Madden
stood nearby. Soon, Glee
star Matthew Morrison
joined his possible future costar
Lopez at the table, and the two giggled and chatted like "old pals," an onlooker says. Guests enjoyed food like Kobe beef and gorgonzola sliders and wild mushroom risotto, while the Grammy telecast played on television screens in the restaurant.
Later in the evening, Knowles and Jay-Z
arrived at Reid's bash, and it became a mini-Destiny's Child reunion for the pop star as she sat next to Michelle Williams
at the dinner table. The two caught up for a long time, leaning in and sharing close conversation. Then, at 10 p.m., Rihanna
arrived and took a seat across from Beyoncé and Jay-Z, who gave her a high-five, as she nibbled on lobster and mascarpone ravioli, while they watched their favorite moments – and acceptance speeches – as everyone applauded.
spent his Grammy Sunday hanging out with sister Maggie Gyllenhaal
and her family over brunch at Ammo Café in Hollywood. "Jake was in a great mood and very playful with his 3-year-old niece, Ramona," a brunch guest says, adding that the actor even shared food with Ramona.
On a hopping patio at West Hollywood's Chateau Marmont, Eva Longoria Parker
was joined by a large group of female friends – including Robin Antin – for a lively dinner, including plenty of laughter and
fried chicken! Across the patio, Will Arnett
and wife Amy Poehler
were also dining with a group.
, getting an organic custom spray tan at Ona Spa in West Hollywood. The Knight and Day
actress liked the treatment so much, she booked an appointment for her stunt double to come in the next day.
By PERNILLA CEDENHEIM, ALEXIS CHIU, JENNIFER GARCIA and JESSICA HERNDONMonday's Couples Watch >